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added erase_flash, utility to erase mtd partition

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primarily for platforms without engineering SPL or native fastboot support
This commit is contained in:
Magnus Eriksson 2010-03-10 18:29:38 +01:00 committed by Koushik K. Dutta
parent 5899ac9ca0
commit 75b930f396
2 changed files with 91 additions and 0 deletions
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9
mtdutils/Android.mk
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@ -28,6 +28,14 @@ LOCAL_STATIC_LIBRARIES := libmtdutils
LOCAL_SHARED_LIBRARIES := libcutils libc
include $(BUILD_EXECUTABLE)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := erase_flash.c
LOCAL_MODULE := erase_flash
LOCAL_MODULE_TAGS := eng
LOCAL_STATIC_LIBRARIES := libmtdutils
LOCAL_SHARED_LIBRARIES := libcutils libc
include $(BUILD_EXECUTABLE)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := flash_image.c
LOCAL_MODULE := libflash_image
@ -46,6 +54,7 @@ LOCAL_MODULE_PATH := $(TARGET_OUT)/utilities
LOCAL_STATIC_LIBRARIES := libmtdutils libcutils libc
include $(BUILD_EXECUTABLE)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := dump_image.c
LOCAL_MODULE := libdump_image

82
mtdutils/erase_flash.c Normal file
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@ -0,0 +1,82 @@
/*
* Copyright (C) 2008 The Android Open Source Project
* Portions Copyright (C) 2010 Magnus Eriksson <packetlss@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <mtd/mtd-user.h>
#include "cutils/log.h"
#include "mtdutils.h"
#ifdef LOG_TAG
#undef LOG_TAG
#endif
#define LOG_TAG "erase_flash"
void die(const char *msg, ...) {
int err = errno;
va_list args;
va_start(args, msg);
char buf[1024];
vsnprintf(buf, sizeof(buf), msg, args);
va_end(args);
if (err != 0) {
strlcat(buf, ": ", sizeof(buf));
strlcat(buf, strerror(err), sizeof(buf));
}
fprintf(stderr, "%s\n", buf);
LOGE("%s\n", buf);
exit(1);
}
/* Erase a mtd partition */
int main(int argc, char **argv) {
MtdWriteContext *out;
size_t erased;
size_t total_size;
size_t erase_size;
if (argc != 2) {
fprintf(stderr, "usage: %s <partition>\n", argv[0]);
return 2;
}
if (mtd_scan_partitions() <= 0) die("error scanning partitions");
const MtdPartition *partition = mtd_find_partition_by_name(argv[1]);
if (partition == NULL) die("can't find %s partition", argv[1]);
out = mtd_write_partition(partition);
if (out == NULL) die("could not estabilish write context for %s", argv[1]);
// do the actual erase, -1 = full partition erase
erased = mtd_erase_blocks(out, -1);
// erased = bytes erased, if zero, something borked
if (!erased) die("error erasing %s", argv[1]);
return 0;
}